High-precision unbalance-loading-resistant synchronous shunt motor

Abstract

The utility model relates to the technical field of synchronous shunt motors, in particular to a high-precision anti-unbalance loading synchronous shunt motor, which comprises at least two shunts and an adjusting valve, the adjusting valve comprises a valve body and a valve core, the two ends of the valve core are thick, the middle of the valve core is thin, and the two ends of the valve core are ends with the same size. A communicating hole communicating the middle outer side face with the right side end face is formed in the valve element. A mounting groove is formed in the valve body and provided with a port A, a port B and a port C, the valve element is mounted in the mounting groove of the valve body, the port C is communicated with the left end face of the valve element, the right end face of the valve element is connected with the middle of the valve element through a communication port, and the port A and the port B are located in the middle of the valve body. The synchronous shunting motor is simple in structure, can keep synchronous precision when unbalance loading occurs, can automatically adjust when the load changes, and keeps high-precision synchronous shunting.

Description

Technical Field

[0001] The utility model relates to the technical field of synchronous shunt motors, in particular to a high-precision anti-eccentric load synchronous shunt motor. Background Art

[0002] Application scenarios with large working spans or heavy loads require synchronous driving of multiple hydraulic actuators. Synchronous shunt motors are often used to synchronously supply oil to multiple hydraulic actuators because of their low cost and small synchronization deviation. However, the synchronization accuracy of synchronous shunt motors is easily affected by eccentric loads. The synchronous shunt motor consists of a series of mutually coupled shunts, each of which has a common oil inlet and its own independent oil outlet. The oil pump provides high-pressure oil to the synchronous shunt motor, and the shunt distributes the high-pressure oil flowing into it. If the sizes of the shunts are the same, the high-pressure oil will be diverted equally; if the sizes of the shunts are different, the diversion is based on the geometric displacement of the shunt. The larger the geometric displacement, the larger the output flow, that is, the geometric displacement is proportional to the output.

[0003] In order to solve the influence of eccentric load on the accuracy of synchronous shunt motor, the invention patent with authorization announcement number CN111734698B discloses a shunt motor speed change synchronization system and working method that can resist time-varying large eccentric load. It can realize high-precision and high-efficiency speed change synchronous drive control under large eccentric load or time-varying load conditions, completely eliminate the influence of eccentric load on shunt accuracy, and resist the interference of time-varying load.

[0004] In the process of realizing the utility model, the inventor discovered that there are at least the following problems in the prior art: the technical solutions of the prior art cause the synchronous shunt motor to have a complex structure, increase in size and cost, which is not conducive to the promotion and application of the equipment. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model develops a high-precision anti-eccentric load synchronous shunt motor, which has a simple structure, can maintain synchronization accuracy when eccentric load occurs, and can automatically adjust when the load changes to maintain high-precision synchronous shunt.

[0006] The technical solution to the technical problem solved by the utility model is as follows: the embodiment of the utility model provides a high-precision anti-eccentric load synchronous shunt motor, including at least two shunts, each shunt is coupled to each other, and an oil inlet E and an oil outlet F are arranged at both ends of the shunt, each oil inlet E is connected, and each oil outlet F is independent, the shunt includes a housing, a transmission shaft, a gear 1, and a gear 2, the gear 1 and the gear 2 are installed in the housing through the transmission shaft, the gear 1 is meshed with the gear 2, and the two sides of the meshing point of the gear 1 and the gear 2 are respectively the oil inlet E and the oil outlet F, and two mutually arranged between two adjacent shunts. The two intermediate wheels are meshed with gear 1 and gear 2 of the diverters on both sides respectively; an adjusting valve is also arranged between the oil outlet F and the diverter, the adjusting valve comprises a valve body and a valve core, the two ends of the valve core are thick and the middle is thin, the two ends of the valve core are end heads of the same size, and a connecting hole connecting the outer side surface in the middle and the right end surface is arranged inside the valve core; an installation groove is arranged in the valve body, and the installation groove is provided with three ports A, B and C. The valve core is installed in the installation groove of the valve body, the C port is connected to the left end surface of the valve core, and the right end surface of the valve core is connected to the middle part of the valve core through the connecting port, and the A port and the B port are located in the middle part of the valve body.

[0007] As an optimization, the cavity between the oil inlet E in the shell and gear one and gear two is an oil pressure chamber, the cavity between gear one, gear two and the shell is a sealed working chamber, and the cavity between the oil outlet F in the shell and gear one and gear two is an oil suction chamber.

[0008] As an optimization, when the pressure at port C of the regulating valve is the same as the pressure at port B, the left end of the valve core is located on the left side of port B, and port B is fully open; when the pressure at port C is greater than the pressure at port B, the valve core moves to the right, and the left end of the valve core partially blocks port B; port C of the regulating valve is connected to port B of the adjacent regulating valve on the left, port C of the leftmost regulating valve is connected to port B of the rightmost regulating valve, port A of the regulating valve is connected to the oil outlet of the diverter, and port B of the regulating valve is connected to oil outlet F.

[0009] As an optimization, the ends and the middle part of the valve core are both cylindrical, and the diameter of the middle part is smaller than the diameter of the ends at both ends.

[0010] As an optimization, the regulating valve also includes a reset spring, which is arranged between the right end face of the valve core and the right side face of the valve body mounting groove. When the reset spring is in a free state, the left end of the valve core is located on the left side of port B, and port B is fully open.

[0011] As an optimization, the synchronous shunt motor also includes a one-way valve, which is arranged between port A and port B of the valve body, and the flow direction of the one-way valve is from port B to port A.

[0012] As an optimization, the synchronous shunt motor further includes a relief valve, which is arranged between the oil outlet F and the B port of the valve body, and the oil outlets D of the relief valves are connected.

[0013] As an optimization, the oil inlet of the overflow valve is connected to the pipeline between the oil outlet F and the valve body B port.

[0014] As an optimization, the synchronous shunt motor also includes a shell and a mounting plate, wherein the mounting plate and the overflow valve are installed outside the shell, and the diverter, the regulating valve and the one-way valve are arranged inside the shell.

[0015] The effects provided in the utility model content are only the effects of the embodiments, not all the effects of the utility model. The above technical solution has the following advantages or beneficial effects:

[0016] 1. Add an adjustment valve between the diverter and the hydraulic actuator, and the adjustment valves are connected in series to form a ring-shaped induction automatic adjustment system. Taking a three-way hydraulic actuator as an example, the middle adjustment valve senses the pressure of the load of the left adjustment valve, and adjusts the outlet pressure of the diverter according to this pressure. The right adjustment valve senses the middle load pressure and adjusts the outlet pressure of the diverter. The left adjustment valve senses the right load pressure and adjusts the outlet pressure of the diverter. This induction adjustment always starts from the line with the largest load pressure, and transmits it to the next line so that the outlet pressure of the diverter of the next line is the same as that of the line with the largest load, until it is transmitted to the last line. The head-to-tail structure ensures that no matter which line has the largest load pressure, that line will be used as the first line for pressure transmission, and it will be transmitted in this way until all branches are covered. The synchronous diverter motor has a simple structure, can maintain synchronization accuracy when an unbalanced load occurs, and can automatically adjust when the load changes to maintain high-precision synchronous diversion.

[0017] 2. By setting a one-way valve between port A and port B of the valve body, after the work is completed, the hydraulic oil flowing from port B of the adjacent branch to port C will flow back to port A of the original branch under the action of the return spring. The return spring has a small elastic force and little effect on the pressure. The return spring is used to reset the valve core to a load-balanced state.

[0018] 3. When in use, the relief valve 3 drives the oil outlet D to connect to the oil tank, and the oil outlet F is connected to the external hydraulic actuator. The relief valve is equivalent to a safety valve. When a hydraulic actuator in the circuit completes its stroke, the high-pressure oil can flow to the oil tank through the relief valve, and other hydraulic actuators can continue to rise until all hydraulic actuators complete their working stroke. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an overall structural diagram of an embodiment of the utility model (the adjusting valve is a structural principle diagram, and the diverter is a schematic diagram).

[0020] Figure 2 This is an overall structural diagram of an embodiment of the utility model (the adjusting valve and diverter are structural principle diagrams).

[0021] Figure 3 This is an overall structural diagram of a flow divider in one embodiment of the utility model.

[0022] Figure 4 This is a front view of an embodiment of the utility model.

[0023] Figure 5 It is a left view of an embodiment of the utility model.

[0024] Among them: diverter 1, adjustment valve 2, overflow valve 3, one-way valve 4, shell 5, mounting plate 6, housing 11, transmission shaft 12, gear 1 13, sealed working chamber 14, oil suction chamber 15, gear 2 17, oil pressure chamber 18, valve body 21, valve core 22, and return spring 23. DETAILED DESCRIPTION

[0025] In order to clearly illustrate the technical features of the present invention, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0026] Example: Figures 1 to 5 An embodiment of the present utility model is as follows: Figure 1 As shown, a high-precision anti-eccentric load synchronous shunt motor includes three shunts 1, each shunt 1 is coupled to each other, and an oil inlet E and an oil outlet F are arranged at both ends of the shunt 1, each oil inlet E is connected, and the oil outlet F is divided into three, namely F1, F2 and F3, and each oil outlet F1, F2 and F3 is independent.

[0027] like Figure 3 As shown, the flow divider 1 includes a housing 11, a transmission shaft 12, a gear 13, and a gear 2 17. The gear 13 and the gear 2 17 are installed in the housing 11 through the transmission shaft 12. The gear 13 is meshed with the gear 2 17. The lower end of the meshing point of the gear 13 and the gear 2 17 is the oil inlet E, and the upper end is the oil outlet F. Two mutually meshing intermediate wheels are arranged between two adjacent flow dividers 1. The two intermediate wheels are respectively meshed with the gear 1 13 and the gear 2 17 of the flow dividers 1 on both sides. The cavity between the oil inlet E in the housing 11 and the gear 1 13 and the gear 2 17 is the oil pressure cavity 18, the cavity between the gear 1 13, the gear 2 17 and the housing 11 is the sealed working cavity 14, and the cavity between the oil outlet F in the housing 11 and the gear 1 13 and the gear 2 17 is the oil suction cavity 15.

[0028] like Figure 2As shown, an adjusting valve 2 is further arranged between the oil outlets F1, F2, F3 and the diverter 1, and the adjusting valve 2 includes a valve body 21 and a valve core 22. The valve core 22 is thick at both ends and thin in the middle, and the two ends of the valve core 22 are end caps of the same size. The interior of the valve core 22 is provided with a connecting hole connecting the outer side surface in the middle and the right end surface; a mounting groove is provided in the valve body 21, and the mounting groove is provided with three ports A, B, and C. The valve core 22 is installed in the mounting groove of the valve body 21, and the C port is connected to the left end surface of the valve core 22, and the right end surface of the valve core 22 is connected to the middle part of the valve core 22 through the connecting port, and the A port and the B port are located in the middle part of the valve body 21. When the pressure of the C port of the regulating valve 2 is the same as the pressure of the B port, the left end of the valve core 22 is located on the left side of the B port, and the B port is fully opened; when the pressure of the C port is greater than the pressure of the B port, the valve core 22 moves to the right, and the left end of the valve core 22 blocks part of the B port; the C port of the regulating valve 2 is connected to the B port of the adjacent regulating valve 2 on the left, the C port of the leftmost regulating valve 2 is connected to the B port of the rightmost regulating valve 2, the A port of the regulating valve 2 is connected to the oil outlet of the diverter 1, and the B port of the regulating valve 2 is connected to the oil outlet F. When in use, the oil outlet F is connected to an external hydraulic actuator. The ends and the middle part of the valve core 22 are cylindrical, and the diameter of the middle part is smaller than the diameter of the ends at both ends.

[0029] The regulating valve 2 further includes a return spring 23, which is arranged between the right end surface of the valve core 22 and the right side surface of the mounting groove of the valve body 21. When the return spring 23 is in a free state, the left end of the valve core 22 is located on the left side of the B port, and the B port is fully opened. The return spring 23 has a very small elastic force and a small effect on the pressure. The return spring 23 is used to return the valve core 22 to a load-balanced state.

[0030] The synchronous flow splitting motor further includes a one-way valve 4, which is arranged between the A port and the B port of the valve body 21, and the flow direction of the one-way valve 4 is from the B port to the A port. By arranging the one-way valve 4 between the A port and the B port of the valve body 21, after the work is completed, the hydraulic oil flowing from the B port of the adjacent branch to the C port will flow back to the A port of the original branch under the action of the return spring 23.

[0031] The synchronous split motor further includes a relief valve 3 , which is arranged between the oil outlet F and the port B of the valve body 21 , and the oil outlets D of the relief valves 3 are connected.

[0032] The oil inlet of the relief valve 3 is connected to the pipeline between the oil outlet F and the valve body 21B. When working, the oil outlet D is connected to the oil tank. The relief valve 3 is equivalent to a safety valve. When a hydraulic actuator in the circuit completes its stroke, the high-pressure oil can flow to the oil tank through the relief valve 3, and other hydraulic actuators can still continue to rise until all hydraulic actuators complete their working stroke.

[0033] like Figure 4 , Figure 5As shown, the synchronous split motor also includes a housing 5 and a mounting plate 6. The mounting plate 6 and the overflow valve 3 are mounted outside the housing 5, and the splitter 1, the regulating valve 2, and the one-way valve 4 are arranged inside the housing 5. The inside of the housing 5 is used to arrange the splitter 1, the regulating valve 2, the one-way valve 4, and to lay the connecting pipelines between the various components. The mounting plate 6 is used to install and fix the synchronous split motor.

[0034] Working principle: add an adjustment valve 2 between the diverter 1 and the hydraulic actuator, and the adjustment valves 2 are connected in series to form a ring-shaped induction automatic adjustment system. Taking a three-way hydraulic actuator as an example, the middle adjustment valve 2 senses the pressure of the load of the left adjustment valve 2, and adjusts the outlet pressure of the diverter 1 of this route according to this pressure. The right adjustment valve 2 senses the middle load pressure and adjusts the outlet pressure of the diverter 1 of this route. The left adjustment valve 2 senses the right load pressure and adjusts the outlet pressure of the diverter 1 of this route. This induction adjustment always starts from the route with the largest load pressure, and is transmitted to the next route so that the outlet pressure of the diverter 1 of the next route is the same as that of the route with the largest load, until it is transmitted to the last route. The end-to-end structure ensures that no matter which route has the largest load pressure, that route will be the first route for pressure transmission, and it will be transmitted in this way until all branches are covered.

[0035] The principle of the induction adjustment of the regulating valve 2 is to use the difference between the sensed pressure and the outlet pressure of the diverter 1 of this route to control the size of the opening of the B port of its own pipeline. The sliding valve structure is adopted. The pressure difference pushes the valve core 22 to move and change the opening size of the B port, thereby changing the pressure. It is equivalent to adding a throttle valve that senses the pressure of the previous route and automatically adjusts at the outlet of the diverter 1. When the opening of the throttle valve becomes smaller, the outlet pressure of the diverter 1 naturally increases. When it increases to the same as the sensed pressure, the left and right thrusts of the valve core 22 are balanced, and the opening size of the throttle valve remains unchanged. The next route senses the pressure change of this route and adjusts quickly. When the regulating valve 2 is adjusted to the same outlet pressure of each diverter 1 according to different loads, the load balancing of the diverter 1 is achieved. By reducing the caliber of the oil outlet F of the low-load diverter 1, the pressure of the oil outlet F of each diverter 1 is unified to the maximum load pressure. After the load pressure of the oil outlet F of each diverter 1 is the same, the diversion amount of the diverter 1 will not be affected by the load deviation, and the same amount of high-pressure oil can be diverted. The difference is that the oil outlet F of the low-load diverter 1 is small in size and the hydraulic oil flow rate is fast.

[0036] The synchronous shunt motor has a synchronization accuracy higher than 2.5% under load-balanced working conditions, and the shunt 1 is always operated under load-balanced working conditions by setting the adjustment valve 2. The synchronization accuracy can naturally be controlled within 2.5% and does not need to be adjusted according to load changes.

[0037] like Figure 1As shown, the hydraulic oil flows from port A to port B, and transmits pressure to the right end face of the valve core 22 through the small hole inside the valve core 22. Port C transmits the pressure of port B of the left adjacent adjustment valve 2 to the left end face of the valve core 22, and the pressure of port B is compared with that of port C. The various paths of the flow divider 1 are always in a pressure balance state, and the synchronization accuracy of the entire synchronous flow divider motor is equivalent to the isobaric synchronization accuracy of the internal flow divider 1.

[0038] The synchronous shunt motor has a simple structure, can maintain synchronization accuracy when an unbalanced load occurs, and can automatically adjust when the load changes to maintain high-precision synchronous shunt.

[0039] Application background of hydraulic synchronous shunt motor: If several motors or hydraulic actuators are driven by the same oil source without any control, the motor or hydraulic actuator with the smallest load will start to move first, and it will not drive the next actuator with a lower load until it reaches the end of the stroke or encounters a larger load. In other words, all hydraulic motors or hydraulic actuators will move in sequence, and so on. However, this working mode is usually not the required mode, so the total flow of the pump needs to be distributed proportionally. For example, two independent platforms lift the same heavy object at the same time. The shape of the heavy object is not necessarily regular, which means that the center of gravity of the heavy object is not necessarily in the center of the two platforms, and due to the existence of manufacturing errors, there are some differences in the resistance of the two platforms themselves, which leads to the inability of the hydraulic actuators to operate synchronously. At this time, a device similar to a hydraulic synchronous shunt motor is needed to distribute the oil to achieve the effect of synchronous lifting.

[0040] Although the specific implementation methods of the utility model are described above in conjunction with the accompanying drawings, this does not limit the scope of protection of the utility model. On the basis of the technical solution of the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the utility model.

Claims

1. A high-precision anti-eccentric load synchronous shunt motor, comprising at least two shunts (1), each shunt (1) is coupled to each other, and an oil inlet E and an oil outlet F are arranged at both ends of the shunt (1), each oil inlet E is connected, and each oil outlet F is independent, wherein: The flow divider (1) comprises a housing (11), a transmission shaft (12), a gear 1 (13), and a gear 2 (17). The gear 1 (13) and the gear 2 (17) are installed in the housing (11) through the transmission shaft (12). The gear 1 (13) meshes with the gear 2 (17). The two sides of the meshing point of the gear 1 (13) and the gear 2 (17) are respectively an oil inlet E and an oil outlet F. Two mutually meshing intermediate wheels are arranged between two adjacent flow dividers (1). The two intermediate wheels are respectively meshed with the gear 1 (13) and the gear 2 (17) of the flow dividers (1) on both sides. A gear 1 (13) and a gear 2 (17) are also arranged between the oil outlet F and the flow divider (1). An adjusting valve (2) is arranged, the adjusting valve (2) comprising a valve body (21) and a valve core (22), the two ends of the valve core (22) being thicker and the middle being thinner, the two ends of the valve core (22) being end caps of the same size, the interior of the valve core (22) being provided with a connecting hole connecting the outer side surface of the middle portion and the right end surface; a mounting groove is arranged in the valve body (21), the mounting groove being provided with three ports A, B and C, the valve core (22) being installed in the mounting groove of the valve body (21), the port C being connected to the left end surface of the valve core (22), the right end surface of the valve core (22) being connected to the middle portion of the valve core (22) through the connecting port, and the ports A and B being located in the middle portion of the valve body (21).

2. The synchronous split motor according to claim 1, characterized in that: The cavity between the oil inlet E in the housing (11) and the gear one (13) and the gear two (17) is an oil pressure cavity (18), the cavity between the gear one (13), the gear two (17) and the housing (11) is a sealed working cavity (14), and the cavity between the oil outlet F in the housing (11) and the gear one (13), the gear two (17) is an oil suction cavity (15).

3. The synchronous split motor according to claim 1, characterized in that: When the pressure at the C port of the regulating valve (2) is the same as the pressure at the B port, the left end of the valve core (22) is located on the left side of the B port, and the B port is fully opened; when the pressure at the C port is greater than the pressure at the B port, the valve core (22) moves to the right, and the left end of the valve core (22) blocks part of the B port; the C port of the regulating valve (2) is connected to the B port of the adjacent regulating valve (2) on the left, the C port of the leftmost regulating valve (2) is connected to the B port of the rightmost regulating valve (2), the A port of the regulating valve (2) is connected to the oil outlet of the diverter (1), and the B port of the regulating valve (2) is connected to the oil outlet F.

4. The synchronous split motor according to claim 1, characterized in that: The ends and the middle part of the valve core (22) are both cylindrical, and the diameter of the middle part is smaller than the diameter of the ends at both ends.

5. The synchronous split motor according to claim 3, characterized in that: The regulating valve (2) further comprises a return spring (23), which is arranged between the right end surface of the valve core (22) and the right side surface of the mounting groove of the valve body (21). When the return spring (23) is in a free state, the left end of the valve core (22) is located on the left side of the B port, and the B port is fully opened.

6. The synchronous split motor according to claim 5, characterized in that: The synchronous flow-dividing motor further comprises a one-way valve (4), which is arranged between port A and port B of the valve body (21), and the flow direction of the one-way valve (4) is from port B to port A.

7. The synchronous split motor according to claim 6, characterized in that: The synchronous split-flow motor further comprises an overflow valve (3), which is arranged between the oil outlet F and the port B of the valve body (21), and the oil outlets D of the overflow valves (3) are connected.

8. The synchronous split motor according to claim 7, characterized in that: The oil inlet of the overflow valve (3) is connected to the pipeline between the oil outlet F and the B port of the valve body (21).

9. The synchronous split motor according to claim 7, characterized in that: The synchronous flow-dividing motor further comprises a housing (5) and a mounting plate (6), wherein the mounting plate (6) and the overflow valve (3) are mounted outside the housing (5), and the flow diverter (1), the regulating valve (2) and the one-way valve (4) are arranged inside the housing (5).

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